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| Pellicle of O. coarctata. Indentations of the plasma membrane (pm) end as coated pits (arrows). Pellicular pores are homologous to parasomal sacs of other ciliates. The surface ridges contain an electron opaque rod (dr) in the cytosol of unknown composition, seen here in cross section. al, alveolus; ep, epiplasm; m, mitochondrion; fv, food vacuole. EM taken on 6/11/60 by R. Allen with Philips 300 TEM. Neg. 30,000X Bar = 0.25µm |
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